It's worth noting that the founders of the Lemkin Institute have, between them, held multiple leadership roles in reputable academic departments devoted to the study of genocide, and have also both been on the ground during or shortly after genocides or other crimes against humanity as part of international teams tasked with figuring out what happened and how to hold perpetrators accountable. These are not some lightweight bloggers.
The US government, in particular Kristi Noem, Donald Trump, and Marco Rubio, are, by the logic of the legal power they themselves invoked, war criminals who rightly belong in the Hague.